<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script type="text/javascript">
        class Person {
            constructor(name, age){
                this.name = name
                this.age = age
            }

            study(){
                console.log(this)
            }
        }
        const p1 = new Person('tom', 18)
        p1.study() // 通过实例调用study方法
        const x = p1.study
        x()
    </script>
</body>
</html>